When to seek medical attention, Heavy Bleeding 15+ days??

hi (24F) some background here. Diagnosed with pcos for 8+ years now, for about 2 years my periods have been semi regular (almost every one and a half months, medium to light flow). recently i changed up my workout routine, going from light weights (5-10kg) to much heavier weights (15-17kg) and more regular workouts (1-2 times a week to 2-4). i had my regular period 10 days before starting the new routine and after starting, got bleeding again suddenly, now lasting about 15 days. This period is much, much heavier with big clots (maybe around the size of a tin can lid) passing every time i pee, with bright red pee.

I’m getting quite worried now because the period doesn’t seem to be getting any lighter and it’s affecting my everyday life, i need to change pads every 3 hours or so because it gets full. Does anyone else have any experience like this and is it time to go to the hospital?